i have an old magazine article somewhere (uncut i think) where it was readers questions or something and they asked why he mentioned them in that song, and he said he did'nt he was just saying a-ha like as in alan partridge would say.
If you think about it it makes sense as all the bands and artists he namechecks are all supposed to be cool and influential, whereas Aha never really influenced anyone other than smash hits reading teenage girls.